Earth-boring reamer



c. 1. WYKOFF. EARTH BORING REAME'R.

APPLICATIQN FILED lIAN. I9. 1920.

1,365,069. Patented Jan. 11,1921.

CHARLES L. WYKOFF, or MooRLAND, IOWA.

EARTH-BORING BEAMER.

Specification of Letters Patent.

Patented Jan. 11, 1921.

Application filed January 19, 1920. Serial No. 352,512.

T0 allwhom 1f/may concern.'

Be it known that I, CHARLES L. WYKoFE, a citizen of the United States of America, and resident of Moorland, lVebster county, Iowa, have invented a new and useful Earth-Boring Reamer, of which the following is a specification.

The object of this invention is to provide improved means for reaming a hole for a well-casing alternately with forming a hole with a drill or auger..

My invention consists in the construction,

arrangement and combination of elements.A

hereinafter set forth, pointed out in the claims and illustrated by the accompanying drawing, in which- Figures 1 and 2 are elevations of the device at right angles to each other, the bits being shown in position for use.' Fig. 3 is a cross-section on the indicated line 3-3 of Fig. l, certain connecting chains being wholly removed. Fig. 4 is a plan, Fig. 5 a side elevation of a bit employed in the device. Fig. 6 is an elevation of a pivot employed to locate a bit in the device.

In the construction .of the device as shown the' numeral 10 designates a head of generally cylindrical form, which is formed with a screw 11 at one' end adapted to be engaged with a drill-rod (not shown) to use this device interchangeably with a drillhead. The head 10 also is formed with wrench-seats 12, 13 on -opposite sides adapted'to facilitate engagement of a wrench with said head in an operation of removing or applying the head relative to the drill-rod. The head 1() also is formed with a stem 14 extending from the end thereof opposite to the screw 11, which stem is generally rectangular in cross-section and of less transverse dimension than the head. Side-bars 15, 16 are mounted on opposite sides of and secured to the stem 14 and said bars extend beyond the outer end of said stem in spaced relation a considerable distance and vthe outer end portions of said bars converge to mutual contact and are connected by a rivet. Backing blocks 18, 19 are mounted between and secured to the side-bars 15, 16 in spaced `relation to each other, and each of said yet, the width of said outer end portions is slightly less than the space between the sidebars 15, 16 in order that they, under conditions hereinafter explained, may be received between said side-bars.. Each bit 21, 22 also is formed with a flange 24 extending upwardly on its outer end and adapted to overlap the lower end of a backing block, 18 or 19. Each bit 21, 22 also is formed with afiange 25 extending downwardly on its outer end, a cutting edge 26 being formed, preferably by forging, on the lower margin of said flange. The cutting edge 26 is sharpened and repaired, after use, preferably by forging. The outer face of each bit 21, 22 lies in two planes forming an obtuse angle between them the uppermost plane 27 having the greater area and providing clearance between the bit and the wall of the reamed hole, and the. lowermost plane 28 having the lesser area, providing less clearance in use and straightening the flange 25 for use. The bits 21` 22 are pivoted on studs or pivots 29, 3() (Fig. 6) mounted in the side-bars 15, 16 in laterally-spaced relation, as follows: Each bit is formed with a hole 31 located in the lower rear corner of its shank and said hole is adapted to receive, and journal the shank on, a' cylindrical portion 32 of one of the studs 29. 30; each stud being formed with a threaded central portion adapted to be screwed into a scat in a side-bar 15, or 16, to locate the pivot portion between the side bars; and each stud being formed with an angular nut-portion 33 adapted to receive the application of a wrench for seating or unseating of the plug. rFlins, either bit may be removed and re'- placed independent kof the other. A stud 34 is ,carried by and extends upwardly from each .bit 21, 22 and a chain 35 (one of which is shown in Fig. 1) connects each studv to one -of two retractile ycoil sprino's between the side bars, the upper ends of said springs being secured properly to the side-bars of the stem 14E. Either spring and chain may be flexed laterally within or through a notch 2O for manipulation of their connections in assembling or removing either bit. The nut portions 33 of the studs project outwardly from the side-bars 15, 16 and, to protect them from injury in the use of the tool, ribs 37, 38 are Jformed on theside-bars adjacent to said studs. End portions of the ribs 37, 38 are tapered to the outer surfaces of the side-bars in order that they may oier a minimum of resistance to reciprocation of the tool in a drill-hole. It is the function of the chains 35 and springs 36 to hold thebits in their uppermost positions and in contact with the backing blocks 18, 19, whereby said bits are in expanded relation with each other and project to a maximum degree laterally from the side-bars. In such positions the bits bite and engage the wall of a drill-hole and, in reciprocation of the tool, cut and wear down said wall and enlarge said drill-hole through the operation of the edges 26. The springs 36 permit either bit to yield downwardly in upward movement oi the tool in use; and also permit the bits to be contracted by downward movement (the edges 26 passing through arcs) so that the outer end portions thereof are substantially received between vthe side-bars, thus permitting the tool to enter and pass through a well-casing. it will be observed that the edges 26 are received between the side-bars in such manner as to avoid contact with the casing or the joints thereof, the bits being held in contracted relation while in the casing by sliding engagement of the plane faces 27, or the side margins thereof wlth the inner face of the casing. The backing blocks 18, 19 serve as hammers above'and on the bits 1n use.

The'connected and converging end portions of the side-bars 15 and 16, below the bits, serve as a guide to keep the tool relatively straight in, and cause it to follow, the drill-hole, and said end portions may be ta ered as desired. v

ither plug 29, 30, may be mounted rigidly in its side-bar support, the other bein removable, and in that event one bit wou d be removable after removing its pivot and the other bit would be removable from its pivot .after the first bit is removed.

I claim as my inventionr 1. An earth-boring reamer, comprising a head, side-bars extending from said head, spaced backing blocks between said sidebars and abutting said head, overlapl ing bits between and pivoted to said sidears and adapted to be wholly received between them and also adapted to abut said backing blocks, and retractlle coil springs acting on said bits and adapted to move and hold them In this connection,`

in extended positions projecting laterally from said side-bars.

a stem, side-bars overlapping and fixed to said stem and extending therefrom in spaced relation, a backing block between said sidebars, the outer end portions of said side-bars converging and being connected, and reamin devices between and carried by said si e-bars and adapted to abut said backing block.

3. In an earth-boring reamer, a head formed with wrench-seats on its sides, a screw on one end and a stem on the other end, side-bars ixed to and extending in spaced relation from said stem, the outer ends of the side-bars being converged and connected, backing blocks between and connected to said side-bars, said backing blocks being spaced apart, and reaming devices between and carried by said side-bars and adapted to abut said backing blocks. 4. In an earth-boring reamer, a head, side-bars secured thereto and extending in spaced relation therefrom, spaced backing blocks between said side-bars, and reaming bits mounted in overlapping relation 'between and adapted to project from opposite sides of said side-bars, and also adapted to abut said backing blocks, said bits being spring-held in extended relation and adapted to move to positions wholly between said side-bars.

5.4 In an earth-borin reamer, a head, a stem on said head, sidears fixed to and'extending in spaced relation from said stem, backing blocks between and connected to said Vside-bars, said backing blocks being spaced apart and formed with notches, reamino' devlces between and carried by said si e-bars and adapted to abut said backing blocks, retractile coil springs mounted between said side-bars adjacent the notches of said backing blocks, and flexible connections between said springs and the respective reaming devices.

6. In an earth-boring reamer, spaced members,'bits mounted in overlapping relation between said members andseparately pivoted thereto, and retractile coil springs secured to said members and to said bits whereby said bits are separately springheld in one direction.

Signed at Moorland in the county of Webster and State of Iowa, this 16th day of December, 1919.

CHARLES L. WYKoFF, 

